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OK, so without the semantics, the data is syntax.

So there we have the CRDT for syntax; it's every CRDT.

Every type has shapes, which are syntax, and those are invariant, as are some other constraints which can be shoehorned into syntax. E.g we can make it a matter of syntax, not semantics, that in {3, "foo", bar, 3.14}, the 3 must be the count of the remaining elements.





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